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0 item @ $0.00  

Germany

Thursday, 30 August 2012 10:00 AM

Minerals from classic German localities including laueite and rockbridgeite from Hagendorf and silver bearing minerals from Freiberg, Saxony; Segen Gottes, Baden; Schneeberg district in Saxony; and Ifeld Manganite.

Silver

#PD33935
Locality
Schlema-Hartenstein dist., Erzgebirge, Saxony, Germany 
Formula
Ag 
Availability
Sold
Size
3 x 2.5 x 1 cm - Thumbnail 
Tagged
native element  

Small, compact arborescent Silver mass.


Silver

Formula
Ag 
Crystal System
Isometric 
Crystal Habit
Arborescent, Dendritic, Massive 
Cleavage
None, None, None 
Luster
Metallic 
Color
silver white, gray white, gray 
Streak
silver white 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 
Collection
Phillips Collection
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Stephanite

with Pyrite - #PD32940
Locality
Freiberg dist., Erzgebirge, Saxony, Germany 
Formula
Ag5SbS4 
Availability
Sold
Size
2.5 x 2.5 x 1.5 cm - Thumbnail 
Tagged
sulfide  

Tiny, 1mm tabular crystals of Stephanite on Pyrite.


Stephanite

Formula
Ag5SbS4 
Crystal System
Orthorhombic 
Crystal Habit
Pseudo Hexagonal, Tabular, Massive 
Cleavage
Imperfect, Poor, None 
Luster
Metallic 
Color
lead gray, black 
Streak
black 
Class
Orthorhombic - Pyramidal 
Fracture
Sub Conchoidal 
Hardness
2-2.5 
Collection
Phillips Collection

Sternbergite

with Argentopyrite. - #PD32943
Locality
Freiberg dist., Erzgebirge, Saxony, Germany 
Formula
AgFe2S3 
Availability
Sold
Size
6.5 x 5 x 3 cm - Sm Cabinet 
Tagged
sulfide  

Antique specimen loaded with tiny micro crystals of tabular, striated Sternbergite and Argentopyrite. I have to say though the two are hard to tell apart. Amongst these crystals are a few unknowns including greenish spheroidal crystals and radial fibrous tan crystals. Photos do not do it justice. Not the two older labels, one from Parnau and the is a Maucher label.


Sternbergite

Formula
AgFe2S3 
Crystal System
Orthorhombic 
Crystal Habit
Radial, Twinning Common 
Cleavage
Perfect, None, None 
Luster
Metallic 
Color
blue violet, golden brown 
Streak
black 
Class
Orthorhombic - Dipyramidal 
Fracture
Flexible 
Hardness
1-1.5 
Collection
Phillips Collection

Topaz

var, pycnite with Biotite - #PD33950
Locality
Altenberg, Erzgebirge, Saxony, Germany 
Formula
Al2SiO4F2 
Availability
Sold
Size
9 x 7 x 5 cm - Sm Cabinet 

Yellow, columnar aggregates of Topaz crystals to 3cm in pegmatite matrix with Biotite.


Topaz

Formula
Al2SiO4F2 
Crystal System
Orthorhombic 
Crystal Habit
Crystalline - Coarse, Prismatic, Massive - Granular 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, pale blue, yellow, yellowish brown, red 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Uneven 
Hardness
Collection
Phillips Collection
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Uranocircite

#PD33932
Locality
Wolsendorf dist., Schwandorf, Bavaria, Germany 
Formula
Ba(UO2)2(PO4)2ยท10H2
Availability
Sold
Size
9 x 9 x 3 cm - Sm Cabinet 
Special Info
Radioactive!! 

Larger specimen of granite with 3-4mm bright yellow flakes and crystals of Uranocircite. Although this might possibly be Autunite or heinrichite.


Uranocircite

Formula
Ba(UO2)2(PO4)2*12(H2O) 
Crystal System
Tetragonal 
Crystal Habit
Foliated, Tabular 
Cleavage
Perfect, Distinct, None 
Luster
Pearly 
Color
yellow, yellow green 
Streak
light yellow 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Flexible 
Hardness
2-2.5 
Collection
Phillips Collection
Special Info
Radioactive!!

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